The ancient group rolling therapy, can receive unexpected results. The specific method is: lie on your back on the bed, relax your whole body, look at the ceiling with both eyes, bend your knees and hips, two thighs close to the abdomen. Cross your fingers, hold the two lower legs under the knees, and squeeze the two lower legs as far as possible to the abdomen. The body then becomes a circular mass like an inverted dwarf. Then roll hard to the left, so that the left ear, shoulder and arm are next to the bed, and then turn around and roll to the right, so that the right ear, shoulder and arm are next to the bed, and so on for 30-50 times. Rolling once a day when you get up in the morning and once a day when you go to bed at night, you can receive good results. The principle of bending knees and rolling is: bending knees and holding legs to make the body form a circle, which can stretch the muscles of the low back to achieve a stretching state. When rolling on the bed, the muscles of the low back and the bed surface come into contact with each other, which results in mechanical massage, elongation of muscle fibers, expansion of blood vessels, acceleration of blood circulation, increase of nutrients and oxygen transported to the low back, increase of resistance of the low back muscles, stretching of contracted muscles and ligaments, prevention of scar adhesion and muscle atrophy, maintenance of normal low back function, and gradual reduction or disappearance of symptoms of low back pain. This method is easy to use and has no side effects, so older people with low back pain may want to give it a try.